green chemistry archives - planet forward - 克罗地亚vs加拿大让球 //www.getitdoneaz.com/tag/green-chemistry/ inspiring stories to 2022年卡塔尔世界杯官网 tue, 07 mar 2023 19:39:49 +0000 en-us hourly 1 https://wordpress.org/?v=6.6.2 safelicell: safer lithium ion batteries //www.getitdoneaz.com/story/safelicell-safer-lithium-ion-batteries/ tue, 08 may 2012 17:32:23 +0000 http://dpetrov.2create.studio/planet/wordpress/safelicell-safer-lithium-ion-batteries/ safelicell was founded by clark school department of chemical and biomolecular engineering (chbe) graduate student aaron fisher, fischell department of bioengineering (bioe) sophomore mian khalid, and their advisor, bioe professor peter kofinas, of the university of maryland.

safelicell has developed a patent-pending, solid-state polymer electrolyte material, called lithium flex, for use in lithium-ion batteries. the material takes the form of a light, strong, flexible film that can be wrapped or bent into different shapes without breaking, and contains no combustible or corrosive materials. at present, the safelicell hopes to enter the market by targeting the battery needs of biomedical and other miniature devices, but the technology could be also be used in consumer electronics.

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proton exchange membrane (pem) fuel cells for batteries //www.getitdoneaz.com/story/proton-exchange-membrane-pem-fuel-cells-for-batteries/ mon, 02 apr 2012 10:22:02 +0000 http://dpetrov.2create.studio/planet/wordpress/proton-exchange-membrane-pem-fuel-cells-for-batteries/ we are headed towards a society that will be largely unplugged – from fossil fuels, wall outlets, etc. – but this relies on the portability of the power system. what we are trying to do is to bring the revolution of electrochemical energy conversion storage.

a battery is an energy storage device. fuel cells, however, are energy conversion devices. they allow the conversion of chemical energy to electrical energy. we are working to develop high performance fuel cells using the most efficient and cost effective materials.

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a sustainable way to think about safety //www.getitdoneaz.com/story/a-sustainable-way-to-think-about-safety/ thu, 20 oct 2011 11:37:53 +0000 http://dpetrov.2create.studio/planet/wordpress/a-sustainable-way-to-think-about-safety/ every year, over 500 billion pounds of plastics are used globally. unfortunately most plastics are quite flammable and additives known as flame retardants (fr) are often added to plastics or coated on textile fabrics to reduce flammability. majority of commercially used fr are based on halocarbons, antimony trioxide, phosphorous-based compounds or metal oxides. we come in contact with these everyday – while driving a car or riding a bus full of plastic components and upholstery treated with fr compounds to minimize the risk of fire. first responders and soldiers battle fire wearing fireproof suits containing these additives on a daily basis.

although effective in imparting fire retardancy, some of these halogenated fr are extremely toxic, environmentally persistent and leach out from polymers increasing our risk to a variety of health disorders, including cancer. realizing this hazard, the use of certain types of halogenated fr has already been banned by the european union and in several states in u.s.a. still, over a billion pounds of fr additives are used commercially worldwide each year.

the umass lowell research team has developed a new class of non-halogenated flame retardant materials by transforming naturally occurring phenols into polymeric fr additives. the synthesis can be performed using clean and environmentally friendly biocatalytic / biomimetic methods as well as using conventional chemical methods. one of the raw materials used is cardanol (a natural phenol) – an inexpensive, renewable and biodegradable byproduct (oil) derived from cashew nut processing.

this project demonstrates the ability to transform a waste byproduct obtained from a renewable source into a value added product with the potential to replace toxic halogenated fr. this new class of fr can eliminate or reduce the use of toxic halogenated fr, contribute to preserving our ecosystem and have a profound positive impact on people’s health and lives.

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scientists urge carbon capture and storage for coal power plants //www.getitdoneaz.com/story/scientists-urge-carbon-capture-and-storage-for-coal-power-plants/ fri, 05 aug 2011 11:30:53 +0000 http://dpetrov.2create.studio/planet/wordpress/scientists-urge-carbon-capture-and-storage-for-coal-power-plants/ every year about 30 billion metric tons of carbon dioxide is released around the world, with almost half that amount coming from coal. in the u.s., coal provides almost half our electricity, making it tough to simply stop burning it. but what if we could capture carbon dioxide from the smokestacks of power plants?

energynow! correspondent dan goldstein explored how innovative carbon capture and storage, or ccs, technologies could keep carbon dioxide out of the atmosphere and help prevent the climate from changing.

“the same types of materials that are used in shampoo and conditioners were materials that we thought we could use in this particular instance to capture carbon,” said bob perry, a chemist with general electric. “with the co2 we’ve captured, we now have it in a confined space and can move that toward someplace for storage, for sequestration.”

ccs may be key to reducing carbon emissions, but installing it on america’s coal-fired power plants won’t be cheap. “the consumer is going to see an increase in the cost of electricity of 5 to 10 cents per kilowatt hour,” said gary rochelle, a chemical engineer at the university of texas in austin who has developed a technology to raise carbon dioxide out of power plant smokestack emissions. “that’s a 50 to 100 percent increase in what they’ll be paying for electricity.”

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despite health concerns, bisphenol-a unregulated in u.s. //www.getitdoneaz.com/story/despite-health-concerns-bisphenol-a-unregulated-in-us/ fri, 24 jun 2011 09:00:35 +0000 http://dpetrov.2create.studio/planet/wordpress/despite-health-concerns-bisphenol-a-unregulated-in-u-s/ the centers for disease control says 93% of us have bisphenol-a in our bodies. from the linings of food and soda cans to eyeglasses, water bottles and dental sealants, billions of pounds of this petroleum-based chemical are used to strengthen plastics. bpa mimics and can interfere with the hormone estrogen. studies show even small amounts can alter reproductive, neurological and immune systems.

“bisphenol-a, research is showing more and more, could lead to diabetes, obesity, early puberty, cancer, a whole range of problems,” said erika schreder of the washington toxics coalition.

canada now lists bpa as a toxic substance. the european union and at least seven states have restricted its use. but the federal government has not taken any regulatory action. the environmental protection agency has listed bpa as a chemical of concern, and the food and drug administration says there’s “some concern about the potential effects of bpa on the brain, behavior and prostate gland of fetuses, infants and children.”

“the public basically wants safer materials. they don’t like that someone isn’t minding the store,” said andy ingrejas, director of safer chemicals healthy families.

“if we can’t get washington to address these problems in a way that really benefits public health, but also benefits the business environment, we’ll see more private efforts in the marketplace. we’re seeing more companies start to address, start to adopt their own chemical policies trying to weed out the known bad chemicals.”

though industry groups like the american chemistry council say “bpa has been safely used for decades,” concerned families, some retailers and interest groups are working to overhaul outdated u.s. chemicals policies so that health and safety information is publicly available.

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